Oil burner



Dec. 7 1926.

G. W. SMITH OIL BURNER Filed Jan.

/NVE'N TOR GEORGE IVILLIAM SMITH, F i?fUlilEALO,v 'NEW YORK, ASSIGNOR TO MAUDE SMITH,

- 0F BUFFALO,

NEW YORK.

OIL BURNER.

Application-med anuary 9, 1926. Serial No. 80,279.

My invention relates to improvements in oil burners ofthe usual type which u lcludc a burner and means for supplylng a mlxture. of oil and air to the burner,I and the obJect of the invention is to cons truct means whereby oil and air are supplied at a predetermined constant ratio A further object of the invention is to devise means whereby the rotations of the fan which constitutes the air blower control the supply of 011 fed to the combustion chamber of the burner, and a still further' object of the invention is to provide for the thorough atomizationof. the oil and a com lete .mixing thereof with the air supplied or combustion.

My invention consists of an 011 burner constructed and arranged all as hereinafter more particularly described andillustrated in the accompanying drawing in which Fig. 1 is a front elevational view of my oil burning apparatus showing the means for supplying air and oil to the burner which is contained interiorly of the furnace, the top portion of which is broken away.

Fig. 2 is a side elevational view of my device showing the combustion chamber and part of the air supply conduit 1n section, a fragmentary portion of the interior of the furnace being shown. t

Fi 8 is an enlarged sectional detail showing t el means whereby the air blower controls the supply of oil to the burner, and

Fig. t` is a detail of the upper portlon of the oil controlling needle valve which is threaded into a sleeve for adjustment purposes. l v p Like characters of' reference indicate the corresponding parts in the different views.

1 is a platform suitably mounted upon a plurality of legs 2 and adapted to be positioned exteriorly of the furnacev and 3 is a blower fan casing positioned centrally upon the upper face of the platform and secured thereon. 4 is an electric motor positioned upon one side of the blower fan lcasing 2,

\ being seated upon the bracket 5 which extends from the casing- The motor is adapt/- ed to rotate the blower fan in the casing 3, being suitably coupled tothe spindle 6 upon which the blower fan is mounted.

7 is the combustion chamber which is ositi'oncd upon a pedestal 8 interiorly o the furnace. The combustion chamber 7 is referably of pot shape and constructed o carborundum or a similar material7 and 9 is a,

baille plate behind which is situated a gas pilot jet 10 for keeping the baile plate hot when the burner is not in operation. In the pot 7 and opposite the bame plate 9 an oritice 11 is situated, and 12 is a sleeve adapted to be inserted into such orifice and project into the pot.' The interior of the sleeve 12 is'so constructed that a throat 13 is formed,

its narrowest part being approximately in` the center of the sleeve and gradually increasing in diameter towards each end. 14

is a second sleeve situated interiorly of and centrally in the sleeve 12, its outer end being bell mouthed and graduallydecreasing in diameter as it approaches the inner end of the sleeve 13 as illustrated in Figure 2.

15 is the oil supply pipe its inner end .ex\-' tending upwardly. into.v the center of .the sleeve 12 and passing into the sleeve 14, its end being open and adapted to permit the oil to enter -su'ch sleeve, and 16 is the air supply conduit which extends `from the air blower casing 3 to the outer endof the sleeve 13, being held in relation thereto by the collar 17 which extends around the ends of both the'sleeve conduit and pipe.

For regulating the supply otoil in la constant fixed relation to thesupply of air, I

`providethe device illustrated in sectionin Figure 3 which I shall now describe.

Upon the opposite side to the motor4 on the blower fan casing 3, a cylindrical casing v20 is positioned, being mountedl upon and secured to a bracket 21Which extends fromthe adjacent face of such blower fan casing. The blower fan spindle 6f is provided with an extension spindle 22 which passes through the casing 20 bein supported centrally 1n the casing in the earings 23in`the ends thereof. In the casing 20 is positioned a ,rotatable ball governor consisting'of a pair of governor balls 24 connected by pairsy of arms 25 and 26 to collars 27 and 28 which are mounted upon the spindle 22, the collar 27 being secured to thespindle, and the collar 28 and attached grooved collar 29 being slidable on the spindlen v 30 is a spiral spring encircling the.

22 and inserted tween the collars 2t and v28.. At the bottom of the outer end of the casing 20, I provide an outwardly extenda passage 3l which connects with a. vertica cylindrical casing' 32, the lower end of the casing 'being open. 33 is a valve seating member adapted to be secured on the bcttom pindle' i end being inserted into the passageway 35. the l p Upon the upper end of the needle valve 36, the chamber 47, t e needle 50 being in the 4 through the upper end o .casing 20, being pivotally mounted in proxof such casing by means of the nut 3l ,fand topl of the needle-valve enters when it moves 35 is a vertical passageway extending upupwardly. v 'y i wardly through the valve seating member The operation of my device is as follows 33, its upper end constituting a seat for the tapered needle valve 36 which extends upcock-60 in the oil feed4 pipe 54 is opened, wardly through the casing 32, the tapered thus pxermitting oil to flow downwardly into c amber 52, assing from thence into an internally ythreaded sleeve 37 is posiraised position-under .the 'influence of the tioned, the needle valve being threaded therecounter-weights 58 on the arms 57. As the into the casing 32, gradually Arise until it comes in contact with being slidable in an orifice 38, and 39 isa the counter-weights 58 lifting them upspiral spring encircling the sleeve 37, being wardly,and thus" moving `the upper ends. of inserted betweenl the inner faceof the upper the arms .57 and the needle valvedownllower end of the sleeve 37. the chamber 47 when a predetermined quan- 41 is an angularlyl positioned arm in the tity of oil has entered therein.

When the lcock '60 is openedpthe switch imity toits lower end upon `a pin 42 whichl controlling the motor 4 is manually closed, extends across the lower portion of the casthus starting the motor which rotates the ing. The upper end of the arm 41 is bifurblower fan, spindle 22, and the 'governor cated and extends aboutV the groovedcollar which is mounted thereon'. After the oil 29 having a pairot inwardly extending pins enters 'the chamber y47 it ilows, therefrom 43 on its bifurcated ends which project into through' the passageway 48v into the lower thegroove in the collar. The lower-'endof portion of the. casing 32, the `needle valve the arm 41 is bent at an angle to the main being in' fthe .closedA positionjas `shown in portion and projects beyond the pin 42, its Figure'3. As the governor balls 28 are roouter end bearing on the upper surface of tated by the spindle22 they swing outwardone end of an arm 44 which is horizontally ly and through Ithe medium of the arms 26 and the sleeve adapted to project oil enters the chamber 47 :the ilat 49 will Upon desiring to operate the burner, the

B0 end of the casing 32 and a'ange 40 on-,the wardly, and cutting olf the oil supply to mounted intermediately of its, length upon connectiny the balls with the collar 28, such a pin 45 which extends across the passagecollar an the connected collar 29 will move way 3l, the other end ofthe arm 44 being along the spindle in. the direction of the bifurcated and adapted to straddle the needle blowerl fan, swinging the arm 41 in an `antivalve 36, its upper face lbeingin contact clockwise direction. vAsfthe lower end of 10 with the lower face of the flange 40. 46 is the arm moves itwill'depress the outer end a lock nut threaded upon the up rend of of the arm 44hwith .the consequent upward the needle valve 36 and adapte to screw movement of the'other or inner end and as down upon the top of the sleeve 37. x t I the inner end presses against the flange 40 A cylindrical chamber 47 is .formed inofthe sleeve 37,"the sleeve and needle valve 105 tegrally with, and positioned beside the ver- 26 will be moved upwardly, thus opening tically disposed casing 32, the interior of the the-entrance'to the passageway 35 and percylindrical chamber 47 bein connected to mitting the oil in the casing 32 to flow downthe interior` of the casing 32 y means of a wardly through the pipe 15 into the burner. horizontal passage 48. Interiorly bf the As the l chamber. 47 I position a cylindrical iloat 49A 24v reach t eir normal rotative speed, the

`through which aneedle valve 50 freely exL- needle valve 36 will be lifted a predeterredeterxnined. quantends, the lower or pointed endof the needle .mined degree, and a valve entering an oriice 51 in the lower face tity of oil will' be a mitted to the burnindle 22 4and the governor balls 110 of the casing, such orifice communicating er. Should therotative speedof the spin- Uf" with a cylindrical chamber` 52 in which a dle be increased due to fluctuations in the cylindrical oil sieve 53 is positioned and 54 electric .current driving the motor, the govis the oil feed ipe,'one end of which con-r ernor balls 28 will swing loutwardly in 'a nects with the c amber 52 and the other endgreater arc and the arm .41 will have a furwith an `oil reservoir, `not shown. 55 is a ther movement, thus further lifting the cap positloned upon the top of the chamber needle valve 36 and permitting a greater 47, and 56 are a pair of downwardly exlquantity of oil topass to the burner, thequantending lugs upon the ends of which a pair tlty'of oil being in the same ratio as the inof arms 57 are pivoted v intermediately of creased. draft of air supplied by the greater thelr length, the upper ends of the arms speed of the blower fan. Should however, 1"

being pivotally c'onected'to the upper end the lrotative speed of the motor become reof the needle valve 50, the lower ends carry-` duced `the speed of the blower fan and the ing counter-weights 58 which rest upon the volume ofair therefrom will also become retop of the float 49. 59 is an extension upon duced and the governor balls 28` will swing the upper face of the cap 55 into which the in a smaller arc, movingthe collars 28 and 130 sequent clock-wise movement of the arm 41 anda resultant partial downward movement' of the needle valve 36 causing a reduction in the oil supply to the burner.

If it is desired to adJust the needle valve 36 in its relation to the passage 35, the lock nut 46 on top of the sleeve 37 is loosened and 4 the needle valve turned either up ordown in the sleeve 37 according to the adjustment required. When the correct Vadjustment is attained the lock nut 46 is turned down to -ing receptacle from ever reaching the conduit through which the lever passes between v its normal position on the topl of the sleeve 37, thus locking the needle valve in the sleeve. 0nl reference to Figure 3 of the drawings it will be seen that by the provision of the oil control float valve mechanism that I have provided a means for pre` l valve mechanism were notv provided the oil lwould flood' such! casing and inally enter and flood the casing 20 in which the governor balls are contained. 'It will therefore be `seen'that the ioat valve controlling the admission of oil' through the oricel prevents the oil in the casing '32 from ever reaching the passage 31 leading to the casing 2O as the bottom of such float is always at a lower level than the bottom of such passage-way. By the provision of the fioat valve the leakage of oilisv obviated even though the cock is left open when the burner is not working as the float will automatically close the needle valve 50 and thus seal the oil contained in the chamber 52 and oil feed pipe 54. f

Fromthe above description it will be apparent that I have devised' an oil burner of very simple construction which can be veryv readily adapted for use in either hot air, water or steam heating systems, the predeter- `.mined ratioof oil and air delivered to the burner bein constant, the supply of oil increasing or cgiecreasing in ratio to the supply of air. ,This outstanding feature of my device insures a practically perfect combustion at all times irrespective of any fluctuations of the electric motor with the consequent va riations of the blower fan speed. It'has been found in experimental tests, that an oil burner constructed as described in 'the foregoing description can be left operating without attention for periods covering two or three weeks, a uniform temperature being maintained at all times. v

What I claim as my invention is:

1. In an oil burning apparatus, the combination cfa-burner, means for supplying oil to said burner, means for supplying air to said burner and having an operating shaft, a governor on said shaft, a receptacle in which said governor is contained, a pair with the governor containing receptacle, a

lever communicating with the governor for actuating the' needle *valve and extending through the communication between the said needle valve receptacle' and the governor re-v ceptacle, and a float actuated valve in the second oil receiving receptacle 'for prevent-l ing the oil level in the needle" valve containsaid receptacle' and the .governor containing receptacle.

2. In an oil burning apparatus, the combination of a burner, .means for supplyingA oil to said burner, means' 'forsupplying air to said `burner and having "an operating shaft, a governor on said shaft, a pair of Vcommunicating o1l receiving receptacles in the oil conduit, one of said' receptacles communicating with a third receptacle in which is contained the governor on the operating shaft, and a float actuated valve in one of the oil receiving receptacles for controlling the` oil level inthe other oil receiving receptacle and preventing such oil from ever passing therefrom into-the governor containing receptacle.

3. In an oil burning apparatus, thecomv bination of a burner, means for supplying oil tosaid burner, means for supplying air to said burner, and having an operating shaft,

a governor on said shaft, a pair of communicating oil receiving receptacles in the oil `conduitfa ioat controlled valve in one of said receptacles for controlling the How of' oil thereinto, a needle valve in said other oil 'ies receiving receptacle. one end of said valve projecting outwardly through an orifice in the receptacle` an adjustable sleeve'on said needle valve which also projects through said orice, a swingable lever actuated by the governor and co-acting with the sleeve on the needle valve,fand means whereby said needle valve may be adjusted in said sleeve in relation to its seating whereby the :tlow of ,oil from the needle valve containing oil receiving receptacle can be manually adjusted.

4. In an oil burningapparatus, the combination of a burner, means for supplying oil to said burner, means for supplyingI air to said burner and having Van loperating shaft, a governor on said shaft, an oil receiving receptacle in the oil conduit. a needle valve 1n said oil receiving-receptacle for controlling the flow ofi oil therefrom, a recep- '125 tacle in which the governor isCOntained, a communicating passage leading from said receptacle to the oil receiving receptacle and communicating therewith intermediately of the height, a swingable lever actuated by the governor: for `controlling the needle valve,

iin

and extending from the governor through the communicating passage into the oil receiving receptacle, a second oil receiving receptacle communicating through a passage with the rst mentioned oil receiving receptacle in the vicinity of its lower end, and a float actuated needle valve in the second oil receiving receptacle for maintaining the oil at a predetermined level 1n the first-mentloned o1l rece1v1ng receptacle wherein such oil level neverreaches the communicatingl passage through which the governor actuated lever extends.

GEORGE WLLIAM SMlTH. 

